ECG-gated MDCT를 이용한 Cardiac CT에서 ECG editing의 유용성과 고찰 = Consideration to efficiency of ECG editing with ECG-gated MDCT in Cardiac scan

다국어 초록 (Multilingual Abstract)

Purpose After spreading the 16 slice MDCT (Multi Detector Computed Tomography) in 2002, Cardiac scan with MDCT has been U5ing for patients presenting angina pectoris and atypical chest pain. Multi segmentation recon is generally U5ed for the cardiac scan. ECG-gating is also essential for that recon. When ECG-gating does not perform properly because of arrhythmia, ECG editing can be useful. The efficiency of ECG-gated MDCT using ECG editing will be mentioned through this paper. Materials and Methods 36 patients (37age ~ 87age: average age : 55, male : 14 female : 22) with ECG-gated MDCT who had been compensated by ECG editing were chosen for objections. 64-slice MDCT (BrillianceTM CT (64 slice), Philips Medical Systems, Netherlands) and Dual auto injector (Stellant, Medrad, USA) were used. After raw data with ECG-gating was compensated by software, chamber view and volume rendering image were obtained. After comparing the pre and post of compensated images, five grades were classified as Very good (all vessels are distinct), Good (vessels more than one are dear), Moderate (all vessels are connected vaguely), Bad (vessels are looked in disconnect way), Very bad( It is difficult to distinguish what it is) Results Among 36 patients before the exam there were 11 patients presenting arrhythmia and 6 patients presenting seismic heart rate. After analyzing 36 patients with ECG editing, there were 11 cases removing the R point because of arrhythmia, 19 cases removing the wrong R point because of the large T wave and 6 cases compensating the R point because the modality recognize it differently. Among these results there were 16 cases that had better improvement, 8 cases that were good, 7 cases that were bad and 5 case that was worse. During 10 months 36 patients were needed the ECG editing, males had more proportion than females (62%). ECG editing was necessary for the patients presenting arrhythmia through CT scan. Even though there were 1 case that had bad improvement, 4 cases had better improvement out of 11 patients. In case that R point was removed because of large T wave, 10 cases had better improvement out of 19 patients. Lastly, in case that R point was not rated properly because of the variation of ECG, there were 4 cases out of 6 cases that had no difference between pre and post of editing. Conclusion The proportion of Good to Bad is 24 to 12. The fact was founded that the ECG editing has a great effect on the recon- images. However, there are some limitations. Firstly, common points among the patients who had the worse result of editing could not be founded. Secondly, there was no assessment whether the patients’ respiration was controlled properly or not.

목차 (Table of Contents)

• Abstract
• Ⅰ. 서론
• Ⅱ. 대상 및 방법
• Ⅲ. 결과
• Ⅳ. 고찰
• Ⅴ. 결론
• 참고문헌